Chicago-latrobe 69855 Cobalt Drill Bit Set 26 Pc A-z

Product Description

The CHICAGO-LATROBE 69855 is a 26-piece cobalt screw machine length drill bit set covering the full letter series from A to Z. Each bit is ground to a 135-degree split point, which reduces walking on entry and lowers the thrust needed to start a hole. The gold finish indicates cobalt steel construction, which holds an edge longer than standard high-speed steel when cutting hard or abrasive metals. The straight shank design seats in any standard drill chuck. Right-hand cutting direction is standard. This set is built for metalworking professionals who need a complete letter-size range on the job or at the bench.

This set is suited for general metalworking and multipurpose drilling applications in both shop and field environments. The screw machine length profile — shorter than jobber length — provides added rigidity and improved accuracy in tight workspaces or on drill presses where column clearance is limited. The included case keeps all 26 bits organized and protected between uses. Machinists, millwrights, pipefitters, and maintenance technicians are the primary users of this type of set.

Key Features

• 135-degree split point reduces drill walking and lowers entry thrust on hard metals
• Cobalt steel construction retains cutting edge at elevated temperatures
• Gold finish identifies cobalt grade at a glance
• Screw machine length body adds rigidity over standard jobber length bits
• Straight shank fits standard 3-jaw drill chucks without adapters
• Full letter series A through Z covered in a single set
• Included case stores all 26 pieces and protects cutting edges

Compatibility

Designed for use in standard drill presses, hand drills, and drill motors accepting straight shank bits. Sized for metalworking and multipurpose drilling applications requiring letter-series drill diameters.

Installation Notes

Secure the workpiece firmly before drilling to prevent rotation or movement. Ensure the drill chuck is tightened fully on the straight shank before starting. Apply cutting fluid when drilling hard or stainless steel alloys to extend bit life and reduce heat buildup. Inspect the split point for chipping or wear before each use and replace individual bits as needed.